Copying machine equipped with synchronously exposing mechanism

ABSTRACT

A copying machine comprising an original detecting member upstream of an original-exposing section of an original transfer passageway, a synchronizing feed roller immediately upstream of the original detecting member, and a sensitive paper detecting member upstream of a sensitive paper-exposing section of a sensitive paper transfer passageway. In order to cause both an original and a sensitive paper to reach the exposing sections synchronously. When the original has reached the original detecting member, the rotation of the synchronizing roller is stopped, and at the same time, the supply of a continuous sheet of sensitive paper is begun, and when the leading edge of the sensitive paper has reached the sensitive paper detecting member, the rotation of the synchronizing roller is resumed. The sensitive paper is cut to a predetermined size by the action of a timer.

United States atent [191 Washio et al.

[ COPYING MACHINE EQUIPPED WITll-I SYNCI-IRONOUSLY EXPOSING MECHANISM [75] Inventors: Takaii Washio, Toyonaka; Kazumi Iida, Neyagawa; Yasusuke Tohi, lkeda; Tatsuo Aizawa, Osaka, all of Japan [73] Assignee: Mita Industrial Company Limited,

Osaka, Japan [22] Filed: July 16, 1973 [21] Appl. No.: 379,489

[451 Oct. 22, 1974 3,684,367 8/1972 Vassitch 355/11 Primary Examiner-Richard L. Moses Attorney, Agent, or Firm-Sherman & Shalloway 5 7 ABSTRACT A copying machine comprising an original detecting member upstream of an original-exposing section of an original transfer passageway, a synchronizing feed roller immediately upstream of the original detecting member, and a sensitive paper detecting member upstream of a sensitive paper-exposing section of a sensitive paper transfer passageway. In order to cause both an original and a sensitive paper to reach the exposing sections synchronously. When the original has reached the original detecting member, the rotation of the synchronizing roller is stopped, and at the same time, the supply of a continuous sheet of sensitive paper is begun, and when the leading edge of the sensitive paper has reached the sensitive paper detecting member, the rotation of the synchronizing roller is resumed. The sensitive paper is cut to a predetermined size by the action of a timer.

19 Claims, 6 Drawing Figures PATENTEDHETZZ 1974 31843251 SHEET 2 OF 3 PATENTEDUCI 22 IBM sum 3 or 3 COPYING MACHINE EQUIPPED WITH SYNCHRONOUSLY EXPOSING MECHANISM This invention relates to :1 copying machine equipped with a mechanism for synchronously exposing an original and sensitive paper automatically fed from a roll of sensitive paper, and more specifically to a device for causing both the original and the sensitive paper to reach the respective exposing sections through the respective transfer passageways with exact synchronization, and cutting the roll of paper to the same length as the original.

Copying machines of the conventional type wherein sensitive paper is automatically supplied from a roll are constructed such that an original detecting switch is provided in the inlet of an original-transferring passageway, and the transfer speeds both at the original transferring passageway and at a sensitive paper transferring passageway are equal because the distance between the original-feed inlet and the center of an originalexposing section is equal to the distance between the sensitive paper cutting position and the center ofa sensitive paper exposing section. In operation, when the original pushes the original-detecting switch at the feed inlet the supply of the sensitive paper is started, and both the original and the sensitive paper reach the respective exposing sections synchronously. The sensitive paper having the same length as the original can be obtained by cutting a roll of the sensitive paper when the rear end of the original has passed the originaldetecting switch and the switch has returned.

However, in a conventional copying machine of the type described above, the distance between the original-feed inlet and the center of the original-exposing section should be made equal to the distance between the sensitive paper cutting position and the center of the sensitive paper-exposing section. Accordingly, the length of each of the respective passageways cannot be minimized, and the dimension of the entire copying machine becomes large.

When the original is fed by hand, the original sometimes goes beyond the original detecting switch at a speed faster than the speed of transferring the sensitive paper. in such a case, there is the defect that not only the length of the cut sensitive paper becomes shorter than that of the original, but also, the image on the sensitive paper is partly defective or deviated because the original reaches its exposing section before the sensitive paper reaches its exposing section.

An object of this invention is to provide a mechanism for completely synchronizing the exposing of an original and that of sensitive paper without the need for making the distance from the original feed end to the center of the original-exposing section equal to that between the sensitive paper cutting position and the center of the sensitive paper-exposing section. This enables the length of each of the passageways to be minimized, and makes it possible to provide a more compact copying machine.

Another object of this invention is to provide a synchronously exposing mechanism whereby an original and sensitive paper can reach the respective exposing sections synchronously irrespective of the speed at which the original is manually fed or the fed distance of the original.

Still another object of this invention is to provide a copying machine equipped with an automatically cutting device for cutting a roll of sensitive paper to a predetermined length automatically.

A further object of this invention is to provide a copying machine wherein a roll of sensitive paper and a sheet-like sensitive paper are selectively used, and in either case, the sensitive paper can be exposed synchronously with the original.

According to the present invention, there is provided a copying machine comprising a passageway for transferring an original, an original exposing section for exposing the original located alongside the transferring passageway, a mechanism for transferring the original at a predetermined speed through said original exposing section, an original detecting member provided upstream of the original exposing section, and a transferring roller for synchronization provided further upwardly of said original detecting member; and a passageway for transferring a roll of sensitive paper, a sensitive paper exposing section for exposing the sensitive paper located alongside the transferring passageway, a mechanism for transferring the sensitive paper through the transferring passageway at the same speed as that of transferring the original, a sensitive paper detecting member provided upstream of said sensitive paper exposing section, and a device for automatically supplying and cutting a roll of the sensitive paper located at the upstream end of said sensitive paper transferring passageway; the distance between the center of said original exposing section and said original detecting member being equal to that between the center of said sensitive paper exposing section and said sensitive paper detecting member, said automatic supplying and cutting mechanism for a roll of the sensitive paper beginning to supply the sensitive paper when the leading edge of the original has reached said original detecting member, and thereafter cutting a roll of the sensitive paper to a predetermined length, and said synchronizing transferring roller stopping its rotation when the leading edge of the original has reached said original detecting member and resuming rotation when the leading edge of the sensitive paper has reached said sensitive paper detecting member.

In another aspect of this invention, there is provided a copying machine comprising a passageway for transferring an original, an original exposing section for exposing the original located alongside said transferring passageway, a mechanism for transferring the original at a predetermined speed through said original exposing section, a first original-detecting member provided upstream of said original exposing section, a transferring roller for synchronization provided further upstream of said first original-detecting member, and a second original-detecting member provided between said first original detecting member and an original feeding end of said passageway; and a passageway for transferring a roll of sensitive paper, a sensitive paper exposing section for exposing the sensitive paper located alongside said passageway, a mechanism for transferring the sensitive paper through said sensitive paper exposing section at the same speed as the speed of transferring the original, a sensitive paper detecting member provided upstream of said sensitive paper exposing section, and a device for automatically supplying and cutting a roll of the sensitive paper located at the upstream end of said sensitive paper transferring passageway; the distance between the center of said original exposing section and said first original detecting member being equal to that, between said sensitive paper exposing section and said sensitive paper detecting member, said automatic supplying and cutting device for a roll of sensitive paper beginning to supply the sensitive paper when the leading edge of the original has reached said second original detecting member,

and thereafter cutting the sensitive paper to a predetermined length, and said synchronizing transferring roller stopping its rotation when the leading edge of the original has reached said first original detecting member and resuming rotation when the leading edge of the sensitive paper has reached said sensitive paper detecting member.

Other objects of this invention will become apparent from the following description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a sketch of a copying machine in accordance with this invention;

FIG. 2 is a circuit diagram for controlling the synchronously exposing mechanism of the copying machine shown in FIG. 1:

' FIG. 3 is a circuit diagram for controlling another type of the synchronously exposing mechanism;

FIG. 4 is a plan view of the copying machine shown in FIG. 1;

FIG. 5 is a side elevation, partly broken away, of the copying machine shown in FIG. 1; and

FIG. 6 is a sketch of a part of a modified type of the copying machine.

Referring to FIG. 1 which shows an electrophotographic copying machine equipped with a mechanism for synchronous exposure in accordance with this invention, the machine frame A has mounted thereon an original transferring mechanism, a device for automatically supplying and cutting a roll of sensitive paper, a mechanism for transferring sensitive paper, and an optical system for exposure.

The original transferring mechanism consists of a plurality of normally driven transferring rollers 5 for transferring an original 1 through an original exposing section 4 equipped with a transparent plate, a synchronizing transferring roller 17, a follow-up roller 5', and a transfer assisting device 3 capable of being removed when a thick original is to be transferred. The device for automatically supplying and cutting sensitive paper is composed of a roll of sensitive paper 2, a pair of rollers 6 having an electromagnetic clutch 6' for feeding photosensitive paper, and a cutting device 7. As will be described in further detail, for example, the cutting device 7 operates after a lapse of the time prescribed by a timer from the beginning of feeding sensitive paper, and cuts the sensitive paper to a predetermined length. The sensitive paper transferring mechanism is made up ofa plurality of normally driven rollers 11 which transfer the sensitive paper fed from a feed roller 6 at the same speed as the speed of transferring the original, through a charging device 8, a sensitive paper exposing section 9 equipped with a transparent plate, a developing device 10 and a drying and fixing section 12.

The optical system for projecting the image of the original onto sensitive paper is constructed of a lamp l3, reflecting mirrors l4 and 16 and an in-mirror lens 15.

For synchronous exposure of the original and the sensitive paper, an original detecting member S, is provided upstream of the original exposing section, along the original transferring passageway by a distance 1,,

and the transferring roller 17 is provided further upstream of the detecting member 8,. Furthermore, along the sensitive paper tranferring passageway, a sensitive paper detecting member SC is provided upstream of the sensitive paper exposing section 9 by a distance 1 equal to the distance I, along the sensitive paper transferring passageway. The detecting members S, and Sr may be switches of any desired type, such as microswitches, operable by the leading edge of the original or sensitive paper. The transferring roller 17 has an electromagnetic clutch l7, and is capable of being stopped independently of the normally driven transferring rollers 5. The detecting members S, and S, control the operation of the transferring roller 17 and the automatic supplying and cutting device for a roll of sensitive paper.

When the original detecting member S, is actuated, the

rotation of the transferring roller 17 is stopped, and the feed rollers 6 of the automatic sensitive paper supplying and cutting device is started. When the sensitive paper detecting member S, is actuated, the rotation of the transferring roller 17 is resumed.

The operation of the mechanism for synchronous exposure will be described. When an original is fed and its leading edge has reached the original detecting member 8,, the roller 17 stops its rotation, and the transferring of the original is interrupted. Simultaneously, the sensitive paper feeding rollers 6 begin to rotate, and the cutting device 7 cuts a roll of sensitive paper to a predetermined length after a lapse of the time prescribed by a timer. When the leading edge of the sensitive paper has reached the sensitive paper detecting member 5,, the transferring roller 17 resumes its rotation, and the original is again transferred from the position of the original detecting member 8,. The distance (1,) between the original detecting member S, and the original exposing section is equal to the distance (1 between the sensitive paper detecting member S, and the center of the sensitive paper exposing section 9, and therefore, the original and the sensitive paper reach the respective exposing sections synchronously.

FIG. 2 shows an example of an electric circuit for controlling the synchronously exposing mechanism of the copying machine shown in FIG. 1. The terminal c of a microswitch S which constitutes the original detecting member is connected to an electric source 24, and the normally closed contact b of the switch S, is connected to an exciting coil 17" of the clutch 17' of the transferring roller 17. The normally open contact a of the switch S, is connected to a relay VT equipped with a timer, and to the terminal 0 of the relay contact r. The normally closed contact a of the relay contact r is connected to a clutch exciting coil 6" of the sensitive paper feeding rollers 6, and the normally open contact b is connected to asolenoid SL which is adapted to actuate the cutting device 7. The terminal 0 of a microswitch S, which constitutes the sensitive paper detecting member is connected to an electric source 24, and the normally open contact a is connected to the exciting coil 17" for the clutch of the transferring roller 17.

The control circuit shown in FIG. 2 is operated as follows: When an original is transferred and its leading edge has reached switch 8,, the normally closed contact b is opened to demagnetize the coil 17" and as a result, stop the rotation of the transferring roller 17 temporarily. At the same time, the normally open contact a of the switch S is closed to feed electric current to the relay VT equipped with a timer, and excite the coil 6" through the normally closed contact a, thereby causing the sensitive paper feed rollers 6 to rotate. After a lapse of the time which has been prescribed according to the desired size of the sensitive paper, the normally closed contact a of the relay contact r opens and its normally open contact b is closed. Consequently, the rotation of the feed rollers 6 is stopped, and at the same time, the solenoid SL is excited to operate the cutting device 7 and cut a roll of sensitive paper to the desired length. When the sensitive paper is transferred and its leading edge has reached the switch 8,, the normally open contact a of the switch S,- is closed, and the rotation of the transferring roller 17 is resumed. As a result, the original is again transferred synchronously with the arrival of the leading edge of the sensitive paper at the switch S,.. Thus the two are synchronously transferred to the exposing sections.

Instead of actuating the automatic supplying and cutting device for a roll of sensitive paper by means of the original detecting member 5,, another original detecting member 8,, may be provided further upstream. Since in this case, the transferring of sensitive paper begins before the original reaches the original detecting member 5,, the time of interruption of the transfer of the original can be shortened. Furthermore, it is also possible to provide another original detecting member 5,, upstream of the transferring roller 17 and to control the rotation of the transferring roller 17 so that it rotates when the original comes into contact with the original detecting member 5,. An example of a circuit for controlling such a synchronous exposing mechanism is shown in FIG. 3. The controlling circuit shown in FIG. 3 is the same as that in FIG. 2 except that a normally open contact b of another original detecting switch S, is connected to the terminal c of switch 5,, the relay VT equipped with a timer and the terminal c of the relay contact r, and therefore the description of its operation will be omitted.

As is shown in FIGS. 1, 4 and 5, the copying machine of this invention may contain a mechanism for selectively utilizing a roll of sensitive paper 2 and a sheetlike sensitive paper 2". The selection mechanism includes a sheet-like sensitive paper feeding passageway 18 with a feed inlet 18 adjacent to the lower end of the feed inlet of the original transferring passageway, and a change-over mechanism capable of opening and closing the feed inlet 18. The change-over mechanism consists of a change-over plate 19, a shaft 20 equipped with a plurality of rollers 21, and a lever 22 secured to one end of the shaft 20. By rotating the shaft 20 by operating the lever 22, the change-over plate 19 opens and closes the feed inlet 18'. A switch S operable by a cam 23 secured to the shaft 20 can be provided at a suitable position of the machine frame A in order to render the automatic supplying and cutting device for a roll of sensitive paper inoperative when a sheet-like sensitive paper is used (that is, when the feed inlet 18' is opened).

In the conventional copying machine in which a sheet-like sensitive paper is used, the distance L between the original feed end of the transferring passageway and the center of the original exposing section is equal to the distance L between the sheet-like sensitive paper feeding end adjacent to the original feeding end and the center of the sensitive paper exposing section, in order to achieve synchronous exposure. Furthermore, it is necessary to register the leading edges of the original and the sensitive paper exactly and feed them synchronously from the respective feeding ends of the transferring passageways. In contrast, in the copying machine of this invention in which a roll of sensitive paper and a sheet-like sensitive paper can be selectively utilized, the distance L, between the original feeding end and the center of the original exposing section can be equal to, or shorter than, the distance L between the sheet-like sensitive paper feeding end and the sensitive paper exposing section.

The original 1 is fed into the original transferring passageway earlier than the sheet-like sensitive paper 2" or almost synchronously with it. When the leading edge of the original 1 has reached the original detecting member 8,, the transferring roller 17 stops until the leading edge of the sensitive paper 2" reaches the sensitive paper detecting member 8,. The distance I, between the original detecting member S, and the center of the original exposing section 4 is equal to the distance 1 between the sensitive paper detecting member S, and the center of the sensitive paper exposing section 9. Therefore, the original 1 and the sheet-like sensitive paper 2 reach the respective exposing sections synchronously.

FIG. 6 shows a part of a modified copying machine in which a roll of sensitive paper is utilized. When in the conventional copying apparatus, it is desired to inspect or repair the component parts disposed along the sensitive paper transferring passageway, such as the automatic supplying and cutting device (2, 6, 7), the charging device 8 or the sensitive paper exposing section 9 or to remove the jamming of the sensitive paper, the individual components should be dismounted, and therefore, such work is complicated and time-consuming. In the modified copying machine, a part 8' of the charging device, a part 9 of the sensitive paper exposing section, a part 11' of the sensitive paper transferring roller and a member which forms the one side of the feeding passageway 18, the automatic supplying and cutting device 2, 6 and 7, and the change-over mechanism (19, 20, 21, 22, 23) are mounted on an independent sub-frame SF which is fixed to the main body of the machine and axially fixed at a support shaft 30. By dint of such a construction, the copying machine can be divided along the sensitive paper transferring passageway, and this is very convenient for the removal of paper jamming or the inspection and repair of the machine.

While the present invention has been described above with reference to an electrophotographic copying machine equipped with a synchronizing exposure mechanism, it should be understood that the invention can be applied to a copying machine of an arbitrary type in which separate transferring passageways are provided both for the original and a roll of the sensitive paper.

What we claim is:

l. A copying machine comprising a passageway for transferring an original, an original exposing section for exposing the original located alongside the transferring passageway, a mechanism for transferring the original at a predetermined speed through said original exposing section, an original detecting member provided upstream of the original exposing section, and a transferring roller for synchronization provided further upwardly of said original detecting member; and a passageway for transferring a sheet of sensitive paper, a sensitive paper exposing section for exposing the sensitive paper located alongside the transferring passageway, a mechanism for transferring the sensitive paper through the transferring passageway at the same speed as that of transferring the original, a sensitive paper detecting member provided upstream of said sensitive paper exposing section, and a device for automatically supplying and cutting a web of sensitive paper supplied from a roll of the sensitive paper located at the upstream end of said sensitive paper transferring passageway; the distance between the center of said original exposing section and said original detecting member being equal to that between the center of said sensitive paper exposing section and said sensitive paper detecting member, said automatic supplying and cutting mechanism beginning to supply the sensitive paper when the leading edge of the original has reached said original detecting member, and thereafter cutting a web of the sensitive paper to a predetermined length, and said synchronizing transferring roller stopping its rotation when the leading edge of the original has reached said original detecting member and resuming rotation when the leading edge of the sensitive paper has reached said sensitive paper detecting member.

2. A copying machine comprising a passageway for transferring an original, an original exposing section for exposing the original located alongside said transferring passageway, a mechanism for transferring the original at a predetermined speed through said original exposing section, a first original-detecting member provided upstream of said original exposing section, a

transferring roller for synchronization provided further upstream of said first original-detecting member, and a second original-detecting member provided between said first original detecting member and an original feeding end of said passageway; and a passageway for transferring a sheet of sensitive paper, a sensitive paper exposing section for exposing the sensitive paper located alongside said passageway, a mechanism for transferring the sensitive paper through said sensitive paper exposing section at the same speed as the speed of transferring the original, a sensitive paper detecting member provided upstream of said sensitive paper exposing section, and a device for automatically supplying and cutting a web of sensitive paper supplied from a roll of the sensitive paper located at the upstream end of said sensitive paper transferring passageway; the distance between the center of said original exposing section and said first original detecting member being equal to that between said sensitive paper exposing section and said sensitive paper detecting member, said automatic supplying and cutting device beginning to supply the sensitive paper when the leading edge of the original has reached said second original detecting member, and thereafter cutting the sensitive paper to a predetermined length and said synchronizing transferring roller stopping its rotation when the leading edge of the original has reached said first original detecting member and resuming rotation when the leading edge of the sensitive paper has reached said sensitive paper detecting member.

3. The copying machine of claim 1 which includes a plurality of normally driven rollers disposed alongside the original transferring passageway for transferring the original, a transfer assisting device covering said original transferring passageway and capable of being removed when a thick original is to be transferred, a charging device along said sensitive paper transferring passageway located between the sensitive paper feeding end and the sensitive paper exposing section, a developing device provided downstream of said sensitive paper exposing section, normally driven rollers disposed along the sensitive paper transferring passageway for transferring the sensitive paper, and an optical system for projecting an image on the original exposing section onto the sensitive paper exposing section.

4. The copying machine of claim I which further includes a mechanism for selecting the utilization of a roll of sensitive paper and a sheet-like sensitive paper.

5. The copying machine of claim 4 wherein the distance between the original feeding end and the center of the original exposing section is equal to, or shorter than, the distance between the sheet-like sensitive paper feeding end and the center of the sensitive paper exposing section.

6. The copying machine of claim 4 wherein said selection mechanism comprises a passageway for feeding a the sheet-like sensitive paper, a change-over member for opening and closing said feed passageway and means interlocking with the change-over member for rendering the automatic sensitive paper supplying and cutting device inoperative.

7. The copying machine of claim 1 wherein said original detecting member and said sensitive paper detecting member are made of microswitches.

8. The copying machine of claim 1 wherein said synchronizing transferring roller is provided with an electromagnetic clutch. g

9. The copying machine of claim 1 wherein said automatic sensitive paper supplying and cutting device comprises feed rollers having an electromagnetic clutch, a timer, and a cutter, said cutter being adapted to cut the sensitive paper after a lapse of the time which is prescribed by said timer from the initiation of the rotation of the feed rollers.

10. The copying machine of claim 3 wherein a part of the charging device located on one side of the sensitive paper transferring'passageway, a part of the sensitive paper exposing section, a part of the normally driven rollers, and the automatic sensitive paper supplying and cutting device are mounted on a sub-frame independently of the main body of the copying machine, said sub-frame being movably mounted on the main body of the copying machine whereby'the copying machine is separable at least along a part of the sensitive paper transferring passageway.

11. The copying machine of claim 2 wherein said second original detecting member is provided upstream of said synchronizing transferring roller, and said synchronizing transferring roller is so controlled that it begins to rotate when the leading edge of said original touches said second original detecting member.

12. The copying machine of claim 2 which includes a plurality of normally driven rollers disposed alongside the original transferring passageway for transferring the original, a transfer assisting device covering said original transferring passageway and capable of being removed when a thick original is to be transferred, a charging device along said sensitive paper transferring passageway located between the sensitive paper feeding end and the sensitive paper exposing section, a developing device provided downstream of said sensitive paper exposing section, normally driven rollers dis- 9 posed along the sensitive paper transferring passageway for transferring the sensitive paper, and an optical system for projecting an image on the original exposing section onto the sensitive paper exposing section.

13. The copying machine of claim 2 which further includes a mechanism for selecting the utilization of a roll of sensitive paper and a sheet-like sensitive paper.

14. The copying machine of claim 13 wherein the distance between the original feeding end and the center of the original exposing section is equal to, or shorter than, the distance between the sheet-like sensitive paper feeding end and the center of the sensitive paper exposing section.

15. The copying machine of claim 13 wherein said selection mechanism comprises a passageway for feeding the sheet-like sensitive paper, a change-over member for opening and closing said feed passageway and means interlocking with the change-over member for rendering the automatic sensitive paper supplying and cutting device inoperative.

16. The copying machine of claim 12 wherein said original detecting member and said sensitive paper detecting member are made of microswitches.

17. The copying machine of claim 12 wherein said synchronizing transferring roller is provided with an electromagnetic clutch.

18. The copying machine of claim 12 wherein said automatic sensitive paper supplying and cutting device comprises feed rollers having an electromagnetic clutch, a timer, and a cutter, said cutter being adapted to cut the sensitive paper after a lapse of the time which is prescribed by said timer from the initiation of the rotation of the feed rollers.

19. The copying machine of claim 12 wherein a part of the charging device located on one side of the sensitive paper transferring passageway, a part of the sensitive paper exposing section, a part of the normally driven rollers, and the automatic sensitive paper supplying and cutting device are mounted on a sub-frame independently of the main body of the copying machine, said sub-frame being movably mounted on the main body of the copying machine whereby the copying machine is separable at least along a part of the sensitive paper transferring passageway.

l l l l 

1. A copying machine comprising a passageway for transferring an original, an original exposing section for exposing the original located alongside the transferring passageway, a mechanism for transferring the original at a predetermined speed through said original exposing section, an original detecting member provided upstream of the original exposing section, and a transferring roller for synchronization provided further upwardly of said original detecting member; and a passageway for transferring a sheet of sensitive paper, a sensitive paper exposing section for exposing the sensitive paper located alongside the transferring passageway, a mechanism for transferring the sensitive paper through the transferring passageway at the same speed as that of transferring the original, a sensitive paper detecting member provided upstream of said sensitive paper exposing section, and a device for automatically supplying and cutting a web of sensitive paper supplied from a roll of the sensitive paper located at the upstream end of said sensitive paper transferring passageway; the distance between the center of said original exposing section and said original detecting member being equal to that between the center of said sensitive paper exposing section and said sensitive paper detecting member, said automatic supplying and cutting mechanism beginning to supply the sensitive paper when the leading edge of the original has reached said original detecting member, and thereafter cutting a web of the sensitive paper To a predetermined length, and said synchronizing transferring roller stopping its rotation when the leading edge of the original has reached said original detecting member and resuming rotation when the leading edge of the sensitive paper has reached said sensitive paper detecting member.
 2. A copying machine comprising a passageway for transferring an original, an original exposing section for exposing the original located alongside said transferring passageway, a mechanism for transferring the original at a predetermined speed through said original exposing section, a first original-detecting member provided upstream of said original exposing section, a transferring roller for synchronization provided further upstream of said first original-detecting member, and a second original-detecting member provided between said first original detecting member and an original feeding end of said passageway; and a passageway for transferring a sheet of sensitive paper, a sensitive paper exposing section for exposing the sensitive paper located alongside said passageway, a mechanism for transferring the sensitive paper through said sensitive paper exposing section at the same speed as the speed of transferring the original, a sensitive paper detecting member provided upstream of said sensitive paper exposing section, and a device for automatically supplying and cutting a web of sensitive paper supplied from a roll of the sensitive paper located at the upstream end of said sensitive paper transferring passageway; the distance between the center of said original exposing section and said first original detecting member being equal to that between said sensitive paper exposing section and said sensitive paper detecting member, said automatic supplying and cutting device beginning to supply the sensitive paper when the leading edge of the original has reached said second original detecting member, and thereafter cutting the sensitive paper to a predetermined length and said synchronizing transferring roller stopping its rotation when the leading edge of the original has reached said first original detecting member and resuming rotation when the leading edge of the sensitive paper has reached said sensitive paper detecting member.
 3. The copying machine of claim 1 which includes a plurality of normally driven rollers disposed alongside the original transferring passageway for transferring the original, a transfer assisting device covering said original transferring passageway and capable of being removed when a thick original is to be transferred, a charging device along said sensitive paper transferring passageway located between the sensitive paper feeding end and the sensitive paper exposing section, a developing device provided downstream of said sensitive paper exposing section, normally driven rollers disposed along the sensitive paper transferring passageway for transferring the sensitive paper, and an optical system for projecting an image on the original exposing section onto the sensitive paper exposing section.
 4. The copying machine of claim 1 which further includes a mechanism for selecting the utilization of a roll of sensitive paper and a sheet-like sensitive paper.
 5. The copying machine of claim 4 wherein the distance between the original feeding end and the center of the original exposing section is equal to, or shorter than, the distance between the sheet-like sensitive paper feeding end and the center of the sensitive paper exposing section.
 6. The copying machine of claim 4 wherein said selection mechanism comprises a passageway for feeding the sheet-like sensitive paper, a change-over member for opening and closing said feed passageway and means interlocking with the change-over member for rendering the automatic sensitive paper supplying and cutting device inoperative.
 7. The copying machine of claim 1 wherein said original detecting member and said sensitive paper detecting member are made of microswitches.
 8. The copying machine of claim 1 wherein saiD synchronizing transferring roller is provided with an electromagnetic clutch.
 9. The copying machine of claim 1 wherein said automatic sensitive paper supplying and cutting device comprises feed rollers having an electromagnetic clutch, a timer, and a cutter, said cutter being adapted to cut the sensitive paper after a lapse of the time which is prescribed by said timer from the initiation of the rotation of the feed rollers.
 10. The copying machine of claim 3 wherein a part of the charging device located on one side of the sensitive paper transferring passageway, a part of the sensitive paper exposing section, a part of the normally driven rollers, and the automatic sensitive paper supplying and cutting device are mounted on a sub-frame independently of the main body of the copying machine, said sub-frame being movably mounted on the main body of the copying machine whereby the copying machine is separable at least along a part of the sensitive paper transferring passageway.
 11. The copying machine of claim 2 wherein said second original detecting member is provided upstream of said synchronizing transferring roller, and said synchronizing transferring roller is so controlled that it begins to rotate when the leading edge of said original touches said second original detecting member.
 12. The copying machine of claim 2 which includes a plurality of normally driven rollers disposed alongside the original transferring passageway for transferring the original, a transfer assisting device covering said original transferring passageway and capable of being removed when a thick original is to be transferred, a charging device along said sensitive paper transferring passageway located between the sensitive paper feeding end and the sensitive paper exposing section, a developing device provided downstream of said sensitive paper exposing section, normally driven rollers disposed along the sensitive paper transferring passageway for transferring the sensitive paper, and an optical system for projecting an image on the original exposing section onto the sensitive paper exposing section.
 13. The copying machine of claim 2 which further includes a mechanism for selecting the utilization of a roll of sensitive paper and a sheet-like sensitive paper.
 14. The copying machine of claim 13 wherein the distance between the original feeding end and the center of the original exposing section is equal to, or shorter than, the distance between the sheet-like sensitive paper feeding end and the center of the sensitive paper exposing section.
 15. The copying machine of claim 13 wherein said selection mechanism comprises a passageway for feeding the sheet-like sensitive paper, a change-over member for opening and closing said feed passageway and means interlocking with the change-over member for rendering the automatic sensitive paper supplying and cutting device inoperative.
 16. The copying machine of claim 12 wherein said original detecting member and said sensitive paper detecting member are made of microswitches.
 17. The copying machine of claim 12 wherein said synchronizing transferring roller is provided with an electromagnetic clutch.
 18. The copying machine of claim 12 wherein said automatic sensitive paper supplying and cutting device comprises feed rollers having an electromagnetic clutch, a timer, and a cutter, said cutter being adapted to cut the sensitive paper after a lapse of the time which is prescribed by said timer from the initiation of the rotation of the feed rollers.
 19. The copying machine of claim 12 wherein a part of the charging device located on one side of the sensitive paper transferring passageway, a part of the sensitive paper exposing section, a part of the normally driven rollers, and the automatic sensitive paper supplying and cutting device are mounted on a sub-frame independently of the main body of the copying machine, said sub-frame being movably mounted on the main body of the copying machine whereby the copying machinE is separable at least along a part of the sensitive paper transferring passageway. 